摘要
试验用Φ360 mm 27CrMnMoV钢(/%:0.27C,0.25Si,0.92Mn,1.06Cr,0.75Mo,0.009P,0.003S,0.088V)铸坯经穿孔和Φ340连轧机组热轧成Φ244.48 mm×15.11 mm无缝管。试验研究了830～950℃水淬,880℃水淬+600～680℃30～120 min回火,以及880℃两次水淬+620～660℃回火工艺对该钢管组织和性能的影响。一般要求V150管屈服和抗拉强度分别为1034～1241 MPa和≥1103 MPa,0℃横向冲击功≥80 J。结果表明,一次淬火+630～655℃60 min回火时Mo和V碳化物析出产生二次硬化,其屈服和抗拉强度分别为1 034～1 150 MPa和1 103～1 225 MPa,0℃横向冲击功为80～108 J。二次淬火+635～655℃60 min回火工艺,循环淬火使奥氏体晶粒细化,提高强度的同时显著改善韧性,其屈服和抗拉强度分别为1 034～1 170 MPa和1 103～1 240MPa,0℃横向冲击功为80～120 J,比一次淬火+回火工艺更容易实现V150高抗挤毁套管性能的稳定性控制。
The tested Ф244. 48 mm × 15.11 mm seamless tube is pierced and hot-rolled by Ф340 continuous rolling mill train from Ф360 mm casting bloom of steel 27CrMnMoV （/% ： 0. 27C, 0. 25Si, 0. 92Mn, 1.06Cr, 0. 75Mo, 0. 009P, 0. 003S, 0. 088V）. The effect of 830～ 950 ℃ water quenching, 880 ℃ water quenching ＋ 600 ～ 680 ℃ 30 ～ 120 min tempering and 880 ℃ double water quenching ＋ 620 ～ 660 ℃ tempering on structure and properties of the steel tube has been tested and researched. The normal requirement on V150 tube yield and tensile strength is respectively 1 034 ～ 1 241 MPa and ≥1 103 MPa, and horizontal impact energy at 0 ℃ ≥80 J. Tested results shown that with once quenched ＋ tempered at 630 ～ 655 ℃ for 60 min, the Mo and V carbides in steel precipitate to produce secondary hardening, the yield and tensile strength of steel are respectively 1 034 ～ 1 150 MPa and 1 103 ～ 1 225 MPa, and horizontal impact energy of steel at 0 ℃ is 80～ 108 J, while with double quenched ＋ tempered at 635 -655 ℃ for 60 min the steel gets fine austenite grains by circle quenching, the strength and toughness of steel increase and improve markedly, its yield and tensile strength are respectively 1 034～ 1 170 MPa and 1 103 ～ 1 240 MPa, and horizontal impact energy at 0 ℃ is 80～ 120 J. As com- pared with once quenching ＋ tempering process the stability control of properties of V150 high anti-collapse casing more easily realizes by double quenching ＋ tempering process.
作者
方剑
黄彦
唐应波
Fang Jian;Huang Yan;Tang Yingbo(College of Mechanical and Electrical Engineering, Huanggang Teachers College, Huanggang 438000;Technical Center, Hubei Xinyegang Steel Co Ltd, Huangshi 435000)
出处
《特殊钢》
北大核心
2018年第3期54-58,共5页
Special Steel
